When reality worlds collide

OK, now we're definitely doomed. If the young Mr. Spock meeting the old Mr Spock in that new "Star Trek" picture didn't warp the delicate fabric of time and space and crumble our universe in seconds, surely this news will do the trick: EntertainmentWeekly.com reported Thursday that former "Laguna Beach" star Kristin Cavallari will join the new season of "The Hills," replacing Lauren Conrad, who left the show because she reportedly has a brain in her head (among other reasons).

You know what this means, of course. It means Conrad, who had been on "Laguna Beach," is being replaced by her former rival on "Laguna Beach." Also, let's not forget that this is a reality show -- which means one person has left her reality (and her friends) and another person will take over her spot in that reality (friends included).

One good thing to come of this: Cavallari said she will be a better Lauren than Lauren. "I'm a completely different person than Lauren," she told EW. "I have a lot more energy. I'm more outgoing."